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Method for simultaneously treating heavy metal chromium and methyl orange in sewage

A technology for simultaneous treatment of heavy metals, applied in alkali metal compounds, chemical instruments and methods, neutralized water/sewage treatment, etc., can solve the problems of increasing adsorbent consumables in sewage treatment steps, increasing the cost of sewage purification, etc., and meet the requirements of preparation conditions Low, simple preparation process, large specific surface area

Pending Publication Date: 2022-07-01
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For sewage containing chromium and methyl orange, it must be purified to absorb the chromium and methyl orange before it can be safely discharged; but often the two elements need to be separated step by step, using different adsorbents to adsorb them one by one Purification; increasing the use of sewage treatment steps and adsorbent consumables increases the cost of large-scale sewage purification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The present embodiment takes the waste water containing heavy metal chromium and methyl orange as a treatment object, and the content of each substance in the waste water is chromium 100mg / L, methyl orange 100mg / L, and the treatment method specifically comprises the following steps:

[0027] S1: Adjust the PH value of the wastewater to 3, standby;

[0028] S2: adding a magnetic porous nano-adsorbent to the wastewater obtained from S1 at a ratio of 50 mg / 100 ml, the adsorption efficiency of chromium reaches 93% after the reaction for 2 hours, and the adsorption efficiency of MO reaches 62%.

[0029] The preparation method of the magnetic porous nano-adsorbent described in this embodiment is as follows:

[0030] S1: Nano Fe is mixed in the proportion of 0.57~0.67g / 100ml 3 O 4 Dispersed into deionized water, after ultrasonic dispersion for 30-60min, in N 2 Under the protection, heating to 60 ° C ~ 80 ° C while stirring to obtain a suspension, 1 ~ 1.5 mol / L Na 2 SiO 3 ...

Embodiment 2

[0036] In this embodiment, wastewater containing heavy metal chromium and methyl orange is taken as the treatment object, and the content of each substance in the wastewater is 100 mg / L of chromium and 100 mg / L of methyl orange, and the treatment method specifically includes the following steps:

[0037] S1: Adjust the PH value of wastewater to 4, standby;

[0038] S2: adding a magnetic porous nano-adsorbent to the wastewater obtained by S1 at a ratio of 50 mg / 100 ml, the adsorption efficiency of chromium reaches 95% after the reaction for 3 hours, and the adsorption efficiency of MO reaches 67%.

[0039] The preparation method of the magnetic porous nano-adsorbent described in this embodiment is as follows:

[0040] S1: Nano Fe is mixed in the proportion of 0.57~0.67g / 100ml 3 O 4 Dispersed into deionized water, after ultrasonic dispersion for 30-60min, in N 2 Under the protection, heating to 60 ° C ~ 80 ° C while stirring to obtain a suspension, 1 ~ 1.5 mol / L Na 2 SiO 3 ...

Embodiment 3

[0046] In this embodiment, wastewater containing heavy metal chromium and methyl orange is taken as the treatment object, and the content of each substance in the wastewater is 100 mg / L of chromium and 100 mg / L of methyl orange, and the treatment method specifically includes the following steps:

[0047] S1: Adjust the PH value of wastewater to 5, standby;

[0048] S2: adding a magnetic porous nano-adsorbent to the wastewater obtained from S1 at a ratio of 60 mg / 100 ml, the adsorption efficiency of chromium reaches 97% and the adsorption efficiency of MO reaches 73% after 4 hours of reaction.

[0049] The preparation method of the magnetic porous nano-adsorbent described in this embodiment is as follows:

[0050] S1: Nano Fe is mixed in the proportion of 0.57~0.67g / 100ml 3 O 4 Dispersed into deionized water, after ultrasonic dispersion for 30-60min, in N 2 Under the protection, heating to 60 ° C ~ 80 ° C while stirring to obtain a suspension, 1 ~ 1.5 mol / L Na 2 SiO 3 The ...

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Abstract

The invention discloses a method for simultaneously treating heavy metal chromium and methyl orange in sewage, which mainly comprises the following steps: S1, adjusting the pH value of the wastewater to 1-7 for later use; s2, adding a magnetic porous nano adsorbent into the wastewater obtained in the step S1 according to a ratio of 50-60mg / 100ml, and reacting for 2-4 hours; the invention also provides a preparation method of the magnetic porous nano adsorbent for adsorbing heavy metal chromium and methyl orange, Fe3O4 coated SiO2 nanoparticles are prepared from nano Fe3O4, and refined kitchen waste grease is prepared from kitchen waste grease as a raw material. Finally, Fe3O4 coated SiO2 nano particles are fused, and the magnetic porous nano adsorbent is prepared by refining kitchen waste grease, so that chromium and methyl orange in sewage can be adsorbed at the same time, and the adsorption rate is considerable.

Description

technical field [0001] The invention belongs to the technical field of sewage purification and treatment, and relates to a method for simultaneously treating heavy metal chromium and methyl orange in sewage. Background technique [0002] A series of industries such as metallurgy, chemical industry, mineral engineering, electroplating, chrome making, pigments, pharmaceuticals, light industrial textiles, production of chrome salts and chrome compounds will produce a large amount of waste water; chrome enters human tissues, metabolized and removed. The slow speed will cause perforation of the nasal septum, gastrointestinal disorders, leukopenia, and lung lesions similar to asthma; irrigating farmland with chromium-containing sewage, chromium will accumulate in plants, and the digestion of organic matter in the soil will be inhibited, resulting in reduced agricultural yields; A Base orange is a water-soluble azo dye, which is widely used in textile, paper, printing and dyeing, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F1/66C02F101/22C02F101/30
CPCB01J20/06B01J20/103B01J20/22B01J20/12B01J20/28009C02F1/281C02F1/286C02F1/66C02F2101/22C02F2101/308
Inventor 汤立红姚大辉蒲桂兰张志能李德辉
Owner YUNNAN UNIV
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